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Editorial Team · 2026-09-16
Why Facebook Suggests the Friends It Does
By Editorial Team · published 2026-09-16 · updated 2026-09-17
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Facebook suggests the friends it does because People You May Know is built from five documented signals, not from reading your mind: friends in common, your networks (current city, school, work), shared Facebook groups, being tagged in the same photo or post, and the phone and email contacts you or other people uploaded. That last one explains most of the unsettling suggestions — the plumber you texted once, the ex's new partner — because a suggestion can come from someone else's address book containing your number, not from anything you did. Meta's help pages say you cannot permanently hide the module from your Feed, only temporarily, but you can remove individual suggestions, delete uploaded contacts, and limit who can find you by phone number or email.
What it actually means
Meta lists the inputs to People You May Know on its own help page, and the list is short. Friend suggestions come from having friends in common; from your networks, which Meta defines as your current city, school or work; from being in the same Facebook group; from being tagged in the same photo or post; and from contacts you uploaded. A related page adds that being part of the same network is a reason on its own, and that the system is updated regularly and "sometimes we might get it wrong".
The word doing the most work is *uploaded*. Contact uploading runs both ways. If you ever let the Facebook or Messenger app read your address book, every number in it became a candidate suggestion for you. And if anyone else uploaded an address book with your number or email in it, you became a candidate suggestion for them — and, by symmetry, they can surface for you. Meta acknowledges this in its separate notice on contact uploading for non-users: people who are not on Facebook at all have their details held because somebody else's phone contained them.
That is why the feature can propose someone you share no mutual friends, groups, school or city with. The only link may be a phone number in a third party's contacts.
Why it works that way
Because friend graphs grow fastest when the suggestions are aggressive, and because contact books are the richest map of real-world relationships Meta can get without asking anyone to type anything. Mutual friends alone would only ever suggest people two hops away; contacts reach people you have actually called. Groups and tag co-occurrence fill in the people you interact with but never friended. The city, school and workplace networks are self-reported and fuzzy, which is why they generate the loosest suggestions — everyone in the same town is a candidate.
Meta also treats removal as training data. Its help page says that removing unhelpful suggestions "helps improve People You May Know so that you see fewer suggestions like them", so the module is designed to be corrected by you rather than configured by you. That is consistent with the other stated limit: you can hide the module from your Feed temporarily, but "you can't permanently hide People You May Know from your Feed", and it may still appear elsewhere on Facebook.
There is one thing Meta says it does not do. Location history was removed as an input years ago after criticism, and the current help page does not list location, browsing or Messenger conversation content among the sources. The suggestions that feel like surveillance are, as of September 2026, almost always contact uploads doing their job.
What it costs you in practice
Your number outs you. A therapist's client, a landlord's tenant, someone who wants to stay unfound — anyone whose number sits in another person's phone can appear in that person's suggestions, complete with profile photo. This is the most common real complaint about the feature and it is a direct consequence of the design.
Reverse exposure. If you uploaded contacts once, in 2015, on a phone you no longer own, those contacts are still on Meta's servers until you delete them, and they still seed your suggestions.
Leaky context. Being tagged in one group photo at a wedding is enough to have the other guests proposed to you for months.
None of this costs money, but it costs the ability to keep parts of your life separate.
What to do about it
Remove the suggestion, do not ignore it. From the Friends tab tap Remove next to the name, or the X on the card in Feed. Meta says this feeds back into what you see.
Delete uploaded contacts. Facebook's Manage Contacts page (Settings → Upload contacts, and the equivalent in Messenger) lets you see and delete everything imported and turn continuous upload off. Do this on every device you have used.
Limit who can find you. Settings → Privacy → How people find and contact you: set "Who can look you up using the phone number you provided" and the email equivalent to Friends or Only me. Meta's help page names this control specifically as a way to reduce your presence in other people's suggestions.
Restrict friend requests to friends of friends and make your friends list private; Meta lists both as ways to change what the feature uses.
Block, when it matters. Blocking someone removes them from your suggestions and removes you from theirs — the only fully symmetric switch Meta offers.
Hide the module via the three-dot Options next to People You May Know → Hide. It comes back; that is documented behaviour, not a bug.
Bottom line
Facebook suggests friends from mutual friends, shared networks, groups, tagged photos and uploaded contacts, and the contact uploads — yours and everyone else's — are what produce the suggestions that feel like it knows too much. You cannot switch the feature off, but deleting imported contacts, limiting phone and email lookup, and removing bad suggestions rather than scrolling past them gets you most of the way there.
